To find out how much more the purple bike costs than the orange bike, you subtract the cost of the orange bike from the cost of the purple bike:
\[ \text{Cost of purple bike} - \text{Cost of orange bike} = 1616.00 - 1170.00 \]
Calculating this gives:
\[ 1616.00 - 1170.00 = 446.00 \]
Thus, the purple bike costs $446.00 more than the orange bike.